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Fix divide by zero

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Kovid Goyal 2023-01-02 22:07:41 +05:30
parent 7237e5cf9c
commit 7c2317d301
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 7 additions and 2 deletions
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9
tools/utils/images/to_rgb.go
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@ -169,8 +169,13 @@ func newScannerRGB(img image.Image, opaque_base NRGBColor) *scanner_rgb {
d := make([]uint8, 3)
for i := 0; i < len(img.Palette); i++ {
r, g, b, a := img.Palette[i].RGBA()
blend(d, s.opaque_base, uint8((r*0xffff/a)>>8), uint8((g*0xffff/a)>>8), uint8((b*0xffff/a)>>8), uint8(a>>8))
s.palette[i] = NRGBColor{d[0], d[1], d[2]}
switch a {
case 0:
s.palette[i] = opaque_base
default:
blend(d, s.opaque_base, uint8((r*0xffff/a)>>8), uint8((g*0xffff/a)>>8), uint8((b*0xffff/a)>>8), uint8(a>>8))
s.palette[i] = NRGBColor{d[0], d[1], d[2]}
}
}
}
return s